Document and Entity Information Statement [Table] Legal Entity [Axis] Entity [Domain] Represents information pertaining to Cubesmart, L.P. and subsidiaries. CubeSmart, L.P. and Subsidiaries CubeSmart, L.P. and Subsidiaries Statement [Line Items] Statement Document Type Document Quarterly Report Document Transition Report Document Period End Date Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Central Index Key Amendment Flag CONSOLIDATED BALANCE SHEETS Assets [Abstract] ASSETS Real Estate Investment Property, at Cost Storage properties Storage properties Real Estate Investment Property, Accumulated Depreciation Less: Accumulated depreciation Real Estate Investment Property, Net Storage properties Storage facilities, net Storage properties, net Net book value of self-storage facilities Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Restricted Cash and Cash Equivalents Restricted cash Debt Issuance Costs, Line of Credit Arrangements, Net Loan procurement costs, net of amortization Equity Method Investments Investment in real estate ventures, at equity Investment in real estate entities Other Assets. Other assets, net Total Assets Total assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND CAPITAL LIABILITIES AND EQUITY Represents the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized senior notes net of discounts, with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Unsecured Senior Notes, Net Unsecured senior notes, net Total unsecured senior notes, net Long-term Line of Credit Revolving credit facility Credit facility, outstanding Notes and Loans Payable Total mortgage loans and notes payable Mortgage loans and notes payable, net Total mortgage loans and notes payable, net Finance Lease, Liability Lease liabilities - finance leases Accounts Payable and Accrued Liabilities Accounts payable, accrued expenses and other liabilities Accounts payable, accrued expenses and other liabilities Dividends Payable Distributions payable Deferred Revenue Deferred revenue Liabilities Total liabilities Total liabilities Temporary Equity, Carrying Amount, Attributable to Noncontrolling Interest Balance of Noncontrolling Interests in the Operating Partnership Balance of Noncontrolling Interests in the Operating Partnership Limited Partnership interests of third parties Noncontrolling interests in the Operating Partnership Commitments and Contingencies. Commitments and contingencies Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Equity Common Stock, Value, Issued Common shares $.01 par value, 400,000,000 shares authorized, 225,521,694 and 227,269,217 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively Additional Paid in Capital. Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent CubeSmart Total CubeSmart shareholders' equity Stockholders' Equity Attributable to Noncontrolling Interest Noncontrolling interests in subsidiaries Joint venture partners Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Balance Balance Total equity Liabilities and Equity Total liabilities and equity Consolidated Entities [Axis] Consolidated Entities [Domain] VIE VIE Common Stock, Par or Stated Value Per Share Common shares, par value (in dollars per share) Common Stock, Shares Authorized Common shares, shares authorized Common Stock, Shares, Issued Common shares, shares issued Common Stock, Shares, Outstanding Common shares, shares outstanding CONSOLIDATED STATEMENTS OF OPERATIONS Product and Service [Axis] Product and Service [Domain] Other Property Related Income Property Management Fee Income Revenues [Abstract] REVENUES Operating Lease, Lease Income Rental income Management Fees Revenue Property related income Revenues. Total revenues Total revenues Costs and Expenses [Abstract] OPERATING EXPENSES Cost of Revenue Property operating expenses Total property operating expenses Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization General and Administrative Expense General and administrative Costs and Expenses Total operating expenses Nonoperating Income (Expense) [Abstract] OTHER (EXPENSE) INCOME Interest Expense [Abstract] Interest: Interest Expense, Debt Interest expense on loans Interest expense on loans Amortization of Financing Costs Loan procurement amortization expense Loan procurement amortization expense Income (Loss) from Equity Method Investments Equity in earnings of real estate ventures Equity in earnings of real estate ventures Company's share of net income (loss) The difference between the carrying value and the sale price of real estate properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. Gain (Loss) on Sale of Real Estate Properties Gains from sales of real estate, net Gain from sale of real estate, net Other Nonoperating Income (Expense) Other Other Other income or expenses related to interest expense on loans, amortization of financing costs, investment income, business combination costs and other costs not specifically identified in the taxonomy. Other Nonoperating Income (Expense), Net Total other expense Net Income (Loss), Including Portion Attributable to Noncontrolling Interest NET INCOME NET INCOME Net income Net Income (Loss) Attributable to Noncontrolling Interest [Abstract] NET (INCOME) LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTERESTS Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable Net income attributable to noncontrolling interests in the Operating Partnership Noncontrolling Interest in Net Income (Loss) Other Noncontrolling Interests, Redeemable Net loss attributable to noncontrolling interests in subsidiaries Net Income (Loss) Available to Common Stockholders, Basic NET INCOME ATTRIBUTABLE TO THE COMPANY Earnings Per Share, Basic Basic earnings per share attributable to common shareholders (in dollars per share) Earnings Per Share, Diluted Diluted earnings per share attributable to common shareholders (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Weighted-average basic units outstanding (in units) Weighted average basic shares outstanding (in shares) Weighted average basic units outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted-average diluted units outstanding (in units) Weighted average diluted shares outstanding (in shares) Weighted average diluted shares outstanding (in shares) CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income: Represents net of tax amount of the income statement impact of the reclassification adjustment of accumulated gain (loss) from interest rate swap agreements designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income. Other Comprehensive Income (Loss) Reclassification Adjustment on Interest Rate Swap Agreements Included in Net Income Net of Tax Reclassification of realized losses on interest rate swaps Other Comprehensive Income (Loss), Net of Tax OTHER COMPREHENSIVE INCOME: Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest COMPREHENSIVE INCOME This element represents Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Noncontrolling Interest. Comprehensive Income, Net of Tax, Attributable to Redeemable Noncontrolling Interest Comprehensive income attributable to noncontrolling interests in the Operating Partnership Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests, excluding redeemable noncontrolling interest. Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest, Excluding the Redeemable Noncontrolling Interest Comprehensive loss attributable to noncontrolling interests in subsidiaries Comprehensive Income (Loss), Net of Tax, Attributable to Parent COMPREHENSIVE INCOME ATTRIBUTABLE TO THE COMPANY CONSOLIDATED STATEMENTS OF EQUITY Equity Components [Axis] Equity Component [Domain] Total Shareholders' Equity Common Shares Additional Paid in Capital Accumulated Other Comprehensive Income (Loss) Accumulated Deficit Noncontrolling Interest in Subsidiaries The axis of temporary equity. Temporary Equity [Axis] Temporary equity reported by a business entity. Temporary Equity [Domain] This element represents that portion of equity (net assets) in an operating partnership not attributable, directly or indirectly, to the parent. Noncontrolling Interests in the Operating Partnership Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Shares, Outstanding Balance (in shares) Balance (in shares) Noncontrolling Interest, Increase from Subsidiary Equity Issuance Contributions from noncontrolling interest in subsidiaries Contributions from noncontrolling interests in subsidiaries Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Distributions paid to noncontrolling interest in subsidiaries Stock Issued During Period, Value, New Issues Issuance of common shares, net Net proceeds after deducting offering costs Stock Repurchased and Retired During Period, Value Repurchase of common shares Stock Repurchased and Retired During Period, Shares Repurchase of common shares (in shares) Stock Issued During Period, Value, Restricted Stock Award, Gross Issuance of restricted shares Stock Issued During Period, Shares, Restricted Stock Award, Gross Issuance of restricted shares (in shares) Stock Issued During Period, Value, Conversion of Units Conversion from units to shares Stock Issued During Period, Shares, Conversion of Units Conversion from units to shares (in shares) Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options (in shares) Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Equity compensation expense Amount of decrease to additional paid-in capital (APIC) for payments upon net settlement of equity compensation. Adjustments to Additional Paid in Capital, Settlement of Equity Compensation Taxes withheld upon net settlement of equity compensation Noncontrolling Interest, Change in Redemption Value Adjustment for noncontrolling interests in the Operating Partnership Adjustment for Operating Partnership interests of third parties Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest Net income (loss) Temporary Equity, Net Income Net income (loss) Amount after tax and reclassification adjustments of other comprehensive income (loss), including portion attributable to temporary equity. Other Comprehensive Income (Loss), Net of Tax Including Portion Attributable to Temporary Equity Other comprehensive income, net Stock Redeemed or Called During Period, Value Redemption of units for cash Dividends, Common Stock Common share distributions Common Stock, Dividends, Per Share, Declared Dividends declared per common share (in dollars per share) Common share distributions (in dollars per share) CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities [Abstract] Operating Activities Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to cash provided by operating activities: Depreciation, Depletion and Amortization Depreciation and amortization, including amortization of loan procurement costs Non-cash portion of interest expense related to finance leases. Finance Lease, Non-cash Portion of Interest Expense Non-cash portion of interest expense related to finance leases Proceeds from Equity Method Investment, Distribution Cash distributed from real estate ventures Share-based Compensation Equity compensation expense Amount of income (expense) related to adjustment to fair value of debt. Fair Value Adjustment of Debt Accretion of fair market value adjustment of debt Increase (Decrease) in Operating Capital [Abstract] Changes in other operating accounts: Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Increase (Decrease) in Other Operating Liabilities Other liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Investing Activities Payments for additions and improvements to real estate assets. Payments for Additions and Improvements to Real Estate Additions and improvements to storage properties Payments to Develop Real Estate Assets Development costs Payments to Acquire Partners Interest in Real Estate Partnership, Net of Cash Acquired Cash paid for partner's interest in real estate venture, net of cash acquired Distributions Payable to Real Estate Partnerships Investments in real estate ventures Proceeds from Distributions Received from Real Estate Partnerships Cash distributed from real estate ventures Proceeds from Sale of Notes Receivable Proceeds from notes receivable Proceeds from Sale of Real Estate Held-for-investment Proceeds from sales of real estate, net Proceeds from sale of real estate, net Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Financing Activities No definition available. Financing Activities Proceeds from Debt [Abstract] Proceeds from: Proceeds from Lines of Credit Revolving credit facility No definition available. Financing Activities Principal Payments on Debt [Abstract] Principal payments on: Repayments of Lines of Credit Revolving credit facility The cash outflow used to purchase loans that are secured with real estate mortgage and from a borrowing supported by a written promise to pay an obligation. Payments of Mortgage Loans and Notes Payable Mortgage loans and notes payable Payments of Loan Costs Loan procurement costs Proceeds from Issuance of Common Stock Issuance of common shares, net Payments for Repurchase of Common Stock Repurchase of common shares Payments Related to Tax Withholding for Share-based Compensation Payments upon net settlement of equity compensation Proceeds from Stock Options Exercised Exercise of stock options The cash outflow for redemption of operating partnership units during the period. Payments For Redemption Of Operating Partnership Units Redemption of units for cash Redemption of OP units for cash Proceeds from Noncontrolling Interests Contributions from noncontrolling interests in subsidiaries Payments to Noncontrolling Interests Distributions paid to noncontrolling interests in subsidiaries Payments of Ordinary Dividends, Common Stock Distributions paid to OP unitholders Distributions paid to common shareholders The cash outflow to return capital to noncontrolled interest in operating partnership. Payments to Minority Shareholders in Operating Partnership Distributions paid to noncontrolling interests in Operating Partnership Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Change in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period Cash, cash equivalents and restricted cash at beginning of period Supplemental Cash Flow and Noncash Information [Abstract] Supplemental Cash Flow and Noncash Information Interest Paid, Net Cash paid for interest, net of interest capitalized Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Supplemental disclosure of noncash activities: This element represents the amount of accretion of liability in noncash investing or financing activities. Accretion Of Liability Accretion of put liability Derivative valuation adjustment associated with non-cash activities. Derivative Valuation Adjustment Derivative valuation adjustment Partners' Capital, Including Portion Attributable to Noncontrolling Interest [Abstract] Capital General Partners' Capital Account General Partner Partners' Capital Total CubeSmart, L.P. capital Partners' Capital Attributable to Noncontrolling Interest Noncontrolling interests in subsidiaries Partners' Capital, Including Portion Attributable to Noncontrolling Interest Balance Balance Total capital